static ssize_t sel_write_load(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
ssize_t length;
void *data = NULL;
mutex_lock(&sel_mutex);
length = task_has_security(current, SECURITY__LOAD_POLICY);
if (length)
goto out;
/* No partial writes. */
length = -EINVAL;
if (*ppos != 0)
goto out;
length = -EFBIG;
if (count > 64 * 1024 * 1024)
goto out;
length = -ENOMEM;
data = vmalloc(count);
if (!data)
goto out;
length = -EFAULT;
if (copy_from_user(data, buf, count) != 0)
goto out;
length = security_load_policy(data, count);
if (length)
goto out;
length = sel_make_bools();
if (length)
goto out1;
length = sel_make_classes();
if (length)
goto out1;
length = sel_make_policycap();
if (length)
goto out1;
length = count;
out1:
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
"policy loaded auid=%u ses=%u",
audit_get_loginuid(current),
audit_get_sessionid(current));
out:
mutex_unlock(&sel_mutex);
vfree(data);
return length;
}
static ssize_t sel_write_load(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
ssize_t length;
void *data = NULL;
mutex_lock(&sel_mutex);
length = avc_has_perm(current_sid(), SECINITSID_SECURITY,
SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL);
if (length)
goto out;
/* No partial writes. */
length = -EINVAL;
if (*ppos != 0)
goto out;
length = -EFBIG;
if (count > 64 * 1024 * 1024)
goto out;
length = -ENOMEM;
data = vmalloc(count);
if (!data)
goto out;
length = -EFAULT;
if (copy_from_user(data, buf, count) != 0)
goto out;
length = security_load_policy(data, count);
if (length) {
pr_warn_ratelimited("SELinux: failed to load policy\n");
goto out;
}
length = sel_make_bools();
if (length) {
pr_err("SELinux: failed to load policy booleans\n");
goto out1;
}
length = sel_make_classes();
if (length) {
pr_err("SELinux: failed to load policy classes\n");
goto out1;
}
length = sel_make_policycap();
if (length) {
pr_err("SELinux: failed to load policy capabilities\n");
goto out1;
}
length = count;
out1:
audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
"policy loaded auid=%u ses=%u",
from_kuid(&init_user_ns, audit_get_loginuid(current)),
audit_get_sessionid(current));
out:
mutex_unlock(&sel_mutex);
vfree(data);
return length;
}